ADI AD7686BRMZ

The AD7686 is a 16-bit, charge redistribution, successive approximation, analog-to-digital converter (ADC) that operates from a single 5 V power supply, VDD. It contains a low power, high speed, 16-bit sampling ADC with no missing codes, an internal conversion clock, and a versatile serial interface port. The part also contains a low noise, wide bandwidth, short aperture delay track-and-hold circuit. On the CNV rising edge, the AD7686 samples an analog input IN+ between 0V to REF with respect to a ground sense IN-. The reference voltage, REF, is applied externally and can be set up to the supply voltage. Power dissipation scales linearly with throughput. The SPI-compatible serial interface also features the ability, using the SDI input, to daisy-chain several ADCs on a single, 3-wire bus or provides an optional busy indicator. This device is compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic, using the separate supply VIO. The AD7686 is housed in a 10-lead MSOP or a 10-lead LFCSP with operation specified from -40°C to +85°C.

• 16-bit resolution with no missing codes
• Throughput: 500 kSPS
• INL: ±0.6 LSB typical, ±z LSB maximum (±0.003% of FSR)
• SINAD: 92.5 dB at 20 kHz
• THD: −110 dB at 20 kHz
• Pseudo differential analog input range 0 V to VREF with VREF up to VDD
• No pipeline delay
• Single-supply 5 V operation with 1.8 V/2.5 V/3 V/5 V logic interface
• Proprietary serial interface: SPI-/QSPI-/MICROWIRE-/DSP compatible
• Daisy-chain multiple ADCs and busy indicator
• Power dissipation 3.75 μW at 5 V/100 SPS, 3.75 mW at 5 V/100 kSPS
• Standby current: 1 nA
• 10-lead MSOP (MSOP-8 size) and 3 mm×3 mm, 10-lead LFCSP (SOT-23 size)
• Pin-for-pin-compatible with 10-lead MSOP/PulSAR ADCs

• Battery-powered equipment
• Data acquisitions
• Instrumentation
• Medical instruments
• Process controls